ITFlow up to 26.06 Recurring Invoice recurring_invoice.php frequency sql injection

Summaryinfo

A vulnerability was found in ITFlow up to 26.06 and classified as problematic. Affected is an unknown function of the file agent/post/recurring_invoice.php of the component Recurring Invoice Handler. Such manipulation of the argument frequency leads to sql injection. This vulnerability is traded as CVE-2026-54596. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in ITFlow up to 26.06. Affected by this issue is an unknown code of the file agent/post/recurring_invoice.php of the component Recurring Invoice Handler. The manipulation of the argument frequency with an unknown input leads to a sql injection vulnerability. Using CWE to declare the problem leads to CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

ITFlow provides an IT documentation, ticketing and accounting system for small managed service providers. Prior to version 26.07, an authenticated Technician or higher with access to at least one client invoice can inject SQL through the frequency parameter handled by agent/post/recurring_invoice.php. The handler passes recurring_invoice_frequency through sanitizeInput but interpolates it unquoted into DATE_ADD, allowing SQL syntax to escape the interval expression, assign additional INSERT columns, store subquery results in recurring_invoice_note, and expose those results through agent/recurring_invoice.php. The persisted recurring_invoice_frequency can execute again when Force Recurring uses it in a later UPDATE, allowing another legitimate user to trigger the second-order injection. This can expose password hashes, SMTP credentials, user records, and database metadata, modify database fields, and enable administrative takeover after credential cracking. This issue is fixed in version 26.07.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-54596 since 06/15/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are needed for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1505 by the MITRE ATT&CK project.

By approaching the search of inurl:agent/post/recurring_invoice.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 26.07 eliminates this vulnerability.

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Name

• ITFlow

Version

• 26.06

CPE 2.3info

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CPE 2.2info

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